Electromagnet.



R. PAM ER.

ELECTRUMAGNET APPLICATION FILED $55.19, 1904.

RENEWED SEPT. 23, .916-

"zzi ented May 1*", 1917.

nveuZ-ar FREDERICK R. gamma, or CHICAGO, ILLmoIs.

ELECTEDMAGNEL.

, Applic tionflled February 15, 1904, Serial No. 194,392.

N v p To allwhom at may concern:

Be it known that LFnsoemcn R. PARKER, acitizen of the United States of" America, residing at Chicago, in the county of Cool:

and State'of Illinois, have invented a new and useful Improvement in Electromagnets, ofwhich the following is a specification, reference being: had to the accompanying drawings, illustrating same, 1

My invention relates in general to electrically-ope'rable devices and more in particularto electromagnets, the devices herein particularly described being what are termed relays.

to provide. an improveddevice of the character above mentloncd; to provide such a de- ,VICG in which the armatures or primary operatin members are operated, or controlled,

by. di erent energizations of, or different degrees of energy in, the device; to provide an improved arrangement of the armatures or primary operatinglmembers lIlrSllCll 'a deto substantially close. the magnetic circuit.

vice; to provide in a inagnetically-operable device of this character an improved arrangement of parts providing an open mag netic structure and a plurality of armatures or primary operating memhers'adapted to substantially close the magnetic circuit of the magnetic structure when attracted; and

to provide a compact and efiicient construction in such a device. Other olqccts will be apparent from the following specification.

In the-preferred form of my invention, 1 provide an open magnetic structure,and an armature adapted to be actuated by a small 'amountoF magnetism in the said structure thereof. 1 I also provide another armature adapted to be attracted only upon a larger amount of magnetism in the magneticstructure, this latter. armature helping to close the magnetic circuit of the device to a greater extent. Thus it will be seen that the two armatures of. the device may be actuated separately upon diiierent energizations, or different degrees of energization, thereof. Thus, starting with the magnetism at zero and gradually increasing it, one armature only will first be attracted, and as the magnetism is increased still further, the other armature will finally be at tracted. When the magnetism is gradually reduced, the last-mentioned armature only will first be released, and finally, with 9.

Specification of Letters Patent.

The principal objects of my invention are,

controlling means or operable portions to be operated by the armatures, and arrange whichalso preferably invention,

elevation; Fig. 9 shows supporting one armature; and Fig. 10 is a Patented May 15,1917.

Renewed September 23, 1816. Serial 1W0. 121,905.

other armature will be released.

I further reduction of the magnetism, the '7 1 preferably mount the armatures one over the other, so that they both tend to close the magnetic circuit at the samepl'ace, when attracted.

I also provide suitable. switches, circuit them in suitablecombinations as will be hereinafter shown. 1 may also employ a casing for mclosing the relay, to protect same from dust or in jury I to its parts.

I will now more particularly dwcribe the preferred forms of my invention by'refer ence to the accompanying drawings, in

Figurel is a side elevation of one form of the device of the invention, showing the inclosing casing in cross-section; Fig. 2 .is a, left end'view of Fig. 1, also showing the casing in cross-section ;,Fig; 3 is a right end view of Fig. 1, without the casing and mounting strip; Fig. 4 is a top-view of the relay shown in Fig. 1; F 5 is a cross-sec tional view of the relay or Fig. 1, taken on line AB of Fig. 4, with portions shown in elevatiomFig. 6 is a cross-sectional view of a portion of a modified form of the invention, taken the same as-Fig. 5, with portions shown in elevation; Fig.7. is a c'rosS-sectional view of another modified form. of the taken the same asFig. 5, with portions shown in elevation; i'g, 8--is a cross-sectional view of a portion of still an other modified form of the invention, taken the same as Fig. 5, with portions shown in the, structure for detail of a port-'on of the other armature and the roller bearing attached thereto.

Likecharaeters refer to like parts in the several figures.

The winding a is placed upon -the magnetic core I) and is adapted to magnetize b when carrying a current of electricity. The

magnetic portion 2' is secured to one end of 7) by a bolt r provided with a nut or collar 1 the bolt 1' also being adapted to hold the relay to a mountingstrip q as shown. 1' is preferably a part of 1'. Insulating portions (7 and are placed upon the respective ends of b','.the ends of 6 being flattened or cut away as at 7 to prevent the portions a7 and c from turning on .7) and also to formshoulders against which (7 and 0 rest when placed" between the portions d and 0. The stri 2' upon the core 6. The winding a is plaged is secured to (Z and 0 by screws m and 8, re-

spectively, the spring members 'mfn and 0 being also mounted on screw 8 and insulated from each other by insulating washers it. Screw s is" also insulated from m, 'n, and 0.

Thus it will be seen that thecore 1),,strip i and insulating portions (Z and 0 are held rigidly together by screws 00 and s and bolt r. Terminal posts 79 p are secured to c, extending through same, and are used as terminal posts for the Winding a. Springs m, n and 0, and posts p p, are adapted to receive circuit 7 conductors. Armature f is loosely pivoted to- ?I by a screw n which passes through f and into 2'. A bushing u, is placed upon u, Fig.

9, the length of being: greater than the thickness of f so that the armature f is free to actuate when u is screwed up tightly. Ar-

mature f fits loosely upon M the head of the erably made of thin magnetic material. Ar-

mature e is also made of magnetic material. and is preferablythlcker than f, it being loosely pivoted upon bolt in which lssecured to a yoke y, the latter being secured tod by screws y Screw It extends through armatures c and f, without interfering with their movement, and into (i. h is an, adjustment screw for'armature e, limiting 1ts backward movement. When 6 1s attracted it rests against a which serves as a stop for e. The same is true of 0 and a, Fig. 6-,; Core b be- 'ing cut away at e as shown, provides a portion of 7) close to c, which greatly'increases the attractionof b on c. Armature e is preferably provided'with an insulating roller 9 loosely held upon bolt so as to provide a roller bearing adapted to engage spring n and operate same-when c is actuated. (Z is a casing adapted tofit over (7 and c and thus inclose the relay.

When the core 6 is siigghtiy magnetized, by

a small current flowing in winding (1, the

armature f will be attracted to core 7), as it 'is adjusted close to 7) and consequently may .,be very sensitive, but armature ewil-l not be attracted, as it is farther away from core .6 and is'not as sensitive asv armature When armature f is attracted, it practicall closes the magnetic circuit through i-tsel core 6 and strip 2', and consetfilently armature '6 will not carry much oft e magnetism until armature f is substantially saturated and some of the megnetism is forced to take the path through armature c. When the current in coil a is increased, the magnetism in 6- increases, and when the magnetism increases sufficiently, armature '6 will become magnetized and be attracted. When the magnetism in 7) is gradually decreased, armature 6 1s released before armature f 1s released. lVhen the magnet1s m 1n' core 7) 1s changed abruptly from zero to a maximum,

or vice versa, both armatures 'actuate'approximately 'at the same t1me.. When the ar- .matures are attracted, they both help to complete the magnetic circuit.

In Fig.5, both armatures operate the same spring a. Armature f 'breaks the contact between the springs 11. and 0 when attracted,

but does not make contact between springs 11 and m. Armature e'makes contact between springs n and m when attracted, continuing the movement of spring n from where armature f left off. When armature c is released it opens the contact between springs in and m, but does not close the con-.

tact between springs n ando. When armature is released it closes thecontact between springs n and 0, continuing the lnovement ot' spring nfromwhere armature e Each armature may, however, control independent contact members or-switch mem-' bers, as in Fig.6, or both armatures mavf' control. the 'same contact, as, in Fig. 8; In F1g.-. 6, armature f. controls the contacts of spr ng n, with sprlngs m, and 0,, and armature 6 controls the contacts of spring n,

withfsprings m and 0 In this figure I have shown armature 0 without the .roller at its free end.

m 7 when attracted, and then, armature e In Fig. .8, armature f anoves snln a 1nto contact with s)r1n moves spring on, out oi contact with-spring n, when attracted. lVhen armature e of Fig. 8 is released 1t moves spring m, into contact with spring n, and then when armature f is released it moves spring 11,, out of contact with spring mp In Fig. 7 I-havcplaced the armatures and 'e at respective ends of core 7),, the

whole being mounted upon a. suitable base d, by screws 8 The terminals of winding a are connected to binding posts 8,. Screw 11),, forms a stop for armature The mag-Y netic strip 2' is secured to the insulating ranged so that the armatures f and e form a closed, 'magnetic circuit, through them-' are mounted on xbolt s,

. washers 25 and'5 of the drawings Serial No. 841,730, 120

. vice shown inFig. ,8 of'the with, the telephone system of my 1 lVhile' I liave shown and limit the .same to such meet various requirements, and I wish it to, be understood that such arrangements are I wound upon the said core,

cation Serial No.

present application.

The relay of Figs-'1, 2, 3, 4 and 5, is uti- -the said magnetic mem armature being pivoted upon members d and 0 by: screws m w, and is arsel'ves, the strip 1',- and the core tracted. Springs 1a,, n 0,, m

and are insulated from each other and from s,

Armature f controls thecontacts of spring a, with springs m and 0 and armature 'e controls the contacts of spring a, with springs m, and 0 The relay device shown in Figs-1, 2,

forms matter of my co-pending rial No. 160,599, on relay, which wasfiled on April 9,1917; The electromagnetiodevice shown in Fig. 7 ofthe drawings forms the subject matter-of my co-peiiding application on electromagnet, which was filedon May 29, 1914. The, relay dedrawings forms the subject matter of my co-pending appli- & 41,729 on relay, which was filed on May 29, 1914. All of these copending. applications are divisions of this b when at lized in, and claimed inconnection with, the telephone systemiof my United States vLetters Patent No. 767,953. The relay of Fig. 8 is utilized in, and claimed in connection I United States Letters' 'Patent No. 1,103,909.

described particular details of construction in the various.

I do not wish to .exactdetails, as many modifications maybev made in the deforms of this invention,

' vices .shownwithout departing from the scope of the appended claims. Many different combinations of springs maybe. ar-' ranged to be operated by the armature's, to

contemplated in this invention.

Having thus described my invention, what 'I claim is:

1. In an electromagnet, the combinationof an openmagnetic structure comprising-a 'core and another magnetic member secured to oneend of the core,- a magnetizing coil and two super posed armatures mounted so as to be'actuated by the said structure,.one armature beingmounted loosely upon a collar carried byher and the other theother side of the core from the said collar, both said armatures being arranged to complete the magnetic circuit when attracted,jone of" th said armatures requiring a stronger magnetizing force to-attract'it' than that required to attract the other armature. In an electromagnet, the

a, and I. 0

by insulating a, i the subject 7 application Seremoved, a second gether, and an inclosing over the said insulating magnetic side. of the core from t combination of aniagnetic core, an insulating head foreach end of the core andplaced thereon,

each endof the core being flattened at one side to prevent the said heads from turning, a Winding placed said heads and adapted to maguetize the said core, a second magnetic member secured to one end 'oithe 'core by a bolt which is also adapted formounting the electromagnet, the saidsecond magnetic member being bent so as to extend parallel with the said core and beingsecured to the said heads. an armature of thin magnetic material pivoted loosely upon the said second magnetic member and adapted to be attracted to one end ofthe core which is suitably cut away to accommodate the said armature,'means for preventing the said armature from sticking to-th'e core after the magnetism has been netic material pivoted loosely upon the op posite side of the core from the said second magnetic member and adapted to be attracted to the said core, this last-mentioned armature overlapping the other armature when attracted and both armatures helping to complete the magnetic circuit when attracted, suitable adjustments and stops for the said ai'matures, to'liniit their movement, the said armatures being adapted t0--be operated upon different strengths of magnet ism, respectively, in the said core, thus allowing them to be operatedseparately or toshell adapted to ("it heads and thereby inclose the electromagnet, substantially as described 1 1 I 3. in an electromagnet, the cuiiihiuution of a magnetic core, a head of insulating material i'oi each end of the core and placed thereon, an" energizing winding carried by the core between the said heads, a second core by a bolt adapted also for mounting the electromagnet to a suitable support, and ex tending substantially parallel with the core, the said second magnetic member being sea cured to the said heads, an, magnetic material pivoted to thesaid second magnetic memberso as to be to the said core, a second armatureof thicker upon the core between the armature of thick magmember secured to one end of the armature of thin T attracted magnetic material pivoited on the opposite 1e said second mug n'etic member so as to be'attracted to the said core, the said armatures overlapping each other when attracted and both helping to complete the magnetic circuit when attracted, suitable adjustments and stops for the said armatui'es, the said armatui'es being adapted to be attracted upon respective degrees of energization of the device whereby they may be operated separately or together, and an i'nclos'ing shell adapted to fit overthe said heads to inclose the device as a whole. v

1 l. In an electromaguet, the combination of a. substantially U-shaped magnetic structure comprising a core and another magnetic member secured to one end of the core, a

magnetizing coil wound upon the core, and two 'armatures'at .one end of the core both arranged to substantially complete the mag-' netic circuit of the U-shaped' structure when attracted, one of thes'aid armatures being pivoted to the said magnetic member, the

other armature being pivoted on the opposite side of the core from the saidinagnetic nieniber, thelsaid-armatures requiring .respective degrees of energization of the electromagnet to effect their attraction.

5. In an electromagnet, a magnetic core and energ zing .meanstherefor, an- L-shaped magnetic member extending substantially parallel with the said core and secured toone end of thelatter, and two aimatures at the other end of the core pivoted on opposite sides thereof and arranged to substantially complete the magnetic circuit when attracted.

6. In a single-spool electromagnet having a core and an open magnetic circuit Withprovisions for. extending the return magnetic'circuit along one side only of .the coreg two armatures pivoted on opposite sideso the core and adapted to substantially .complete the magnetic circuit when attracted.

.7, In a single-core electromagnet having an open magnetic structure with provisions for extending the-return magnetic circuit along onev side only-of the core, two sepai'a tely-operable overlapping armatures opp o'sitely pivoted adjacent the respective poles .of the magnetic structure and adapted to substantially complete the magnetic circuit '7 when attracted.

8. In a'single-core electromagnet-having an open magnetic circuit with provisions for extending the return magnetic circuit along oii-e'sid'e'only of the'core, two, armatures pivoted on opposite sides of the coreand' adapted to substantially complete the magnetic circuit when attracted,

9. In an electromagnet having but a single the core, two aiinatures. at one end of the core pivoted on oppositesides thereof so as to be attracted thereto; 10. In an electromagnet having but a 1 single core with provisions for extending the return magnetic circuit along onesidevonly of the core, two armatures p voted on opposite sides of the'core, and adapted to: be at tracted thereto. I a i 11. In a single-core 'electroinagnet having an open magnetic circuit with provisions for extending the return magnetic circuit along one. side only of the core, two arina -tures oppositely pivoted-and adapted to substantially complete the magnetic circuit when attracted.

.ma-gnetic circuit of thema of a magnetic structure comprising a core and an L-shaped magnetic member secured to one endof the core, means for magnetizing the magnetite structure and two armatures arranged to substantially complete the etic structure, one of the said armatures being ope'rably attached to the said L other armature being pivoted on the opposite side of the core from the L-shaped member, the said armatures requiring re-, spective degrees of energizatio'n of'the' elec tromagnetto efl'ect their attraction.

13.- In an electromagnet, the combination of a magnetic structure comprising but a single core and an L-shaped magnetic member magnetically connected with one end of the core, means for magnetizing the maganetic structure, and two armatures arrang to substantially complete the magnetic circuit of the magnetic structure, one of the said armatures being operably associated with the said L-shaped' member, the said armatures requiring respective degrees 0t .energization of the electromagnet'to effect their attraction.

' dmember and the 14 In. an electromagnet,-the combination 7 15.'In an electromagnet, the combination with an open magnetic structure comprising a single corehaving pIOVlSlOnS for a re. rn

' magnetic circuitalong one side only of "the "core, of armatures therefor oppositely "pi v-, oted adjacent the respective ends of the said magnetic structure and overlapping each other toa certainextent. 16. In an electromagnet, the combination with a- U-sha ed magnetic structure, of arm=- atures' there or oppositely pivoted adjacent .the respective polesof the said magnetic structure. I v

17; In an' electromagnet, the combination with an open magnetic structure comprising a'single core having 1 8. In anelectromagnet, the combination revisions for a ie 115 turn magnetic circuit a ong one side only of the core, of. armatures therefor-oppositely with an open magnetic structure, of armatures therefor oppositely pivotedadjacent the respective poles-of the magnetic structure and overlapping each other.

19. In an electromagnet, the combination with a substantially U-shaped magnetic structure, of aitmatures therefor pivoted adjacent the respectivepoles of the magnetic structure. v

20. In an electromagnet, the combination w'ieh an open magnetic structure, of urinatnres therefor pivoted adjacent the respeo tive poles of the magnetic strucune and overlapping each other.

21. In an electromagnet having a sore and means for energizing the some, two overlapping fu'inatures zidzipteci and ai'innged to be attracted by the end surface of one end of the core, the said enci of the core having a portion thereof cut away on one side there of for accommodating one of the arm-eaves hereby different poraioi'is the end surface of the said end of the core are in close proximity to the respective.armatures for attracting them.

In Witness whereof I hei eunto subscribe my mime this 16th day of Efiehruziry, A. D. 1901!.

B. PARKER.

FREDERiCK 

